<![CDATA[Packaging plays a vital role in brand identity building in the digital era, particularly through logo application. This study aims to design an automatic logo stamping machine for flexible packaging made of low-density polyethylene (LDPE) and analyze the effects of pneumatic pressure (4-6 bar) and stamping duration (1–5 seconds) on print quality. The machine integrates an Arduino Uno controller, a TCS3200 color sensor for automatic package positioning, and a pneumatic cylinder (30 mm stroke) as the pressing actuator. Operating at 220 V AC, the system enables fully automated logo printing on a conveyor belt. Print quality was evaluated using a 1-5 Likert scale based on the line sharpness, color density, and substrate integrity. Results indicate that 6 bar is the minimum pressure required to achieve consistently sharp prints; lower pressures (4-5 bar) failed to transfer ink effectively. The optimal parameter combination was identified as 6 bars for 1 second, balancing high print quality with operational efficiency. This solution provides a low-cost, user-friendly, and practical technology for micro-enterprises seeking to enhance packaging aesthetics independently and economically.]]>
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